diff options
Diffstat (limited to 'src/gallium/drivers/lima/ir/lima_nir_duplicate_intrinsic.c')
| -rw-r--r-- | src/gallium/drivers/lima/ir/lima_nir_duplicate_intrinsic.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/gallium/drivers/lima/ir/lima_nir_duplicate_intrinsic.c b/src/gallium/drivers/lima/ir/lima_nir_duplicate_intrinsic.c new file mode 100644 index 00000000000..8d1c7dc5c32 --- /dev/null +++ b/src/gallium/drivers/lima/ir/lima_nir_duplicate_intrinsic.c @@ -0,0 +1,163 @@ +/* + * Copyright (c) 2020 Lima Project + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "nir.h" +#include "nir_builder.h" +#include "lima_ir.h" + +static bool +lima_nir_duplicate_intrinsic(nir_builder *b, nir_intrinsic_instr *itr, + nir_intrinsic_op op) +{ + nir_intrinsic_instr *last_dupl = NULL; + nir_instr *last_parent_instr = NULL; + + nir_foreach_use_safe(use_src, &itr->dest.ssa) { + nir_intrinsic_instr *dupl; + + if (last_parent_instr != use_src->parent_instr) { + /* if ssa use, clone for the target block */ + b->cursor = nir_before_instr(use_src->parent_instr); + dupl = nir_intrinsic_instr_create(b->shader, op); + dupl->num_components = itr->num_components; + memcpy(dupl->const_index, itr->const_index, sizeof(itr->const_index)); + dupl->src[0].is_ssa = itr->src[0].is_ssa; + if (itr->src[0].is_ssa) + dupl->src[0].ssa = itr->src[0].ssa; + else + dupl->src[0].reg = itr->src[0].reg; + + nir_ssa_dest_init(&dupl->instr, &dupl->dest, + dupl->num_components, itr->dest.ssa.bit_size, + itr->dest.ssa.name); + + dupl->instr.pass_flags = 1; + nir_builder_instr_insert(b, &dupl->instr); + } + else { + dupl = last_dupl; + } + + nir_instr_rewrite_src(use_src->parent_instr, use_src, nir_src_for_ssa(&dupl->dest.ssa)); + last_parent_instr = use_src->parent_instr; + last_dupl = dupl; + } + + last_dupl = NULL; + last_parent_instr = NULL; + + nir_foreach_if_use_safe(use_src, &itr->dest.ssa) { + nir_intrinsic_instr *dupl; + + if (last_parent_instr != use_src->parent_instr) { + /* if 'if use', clone where it is */ + b->cursor = nir_before_instr(&itr->instr); + dupl = nir_intrinsic_instr_create(b->shader, op); + dupl->num_components = itr->num_components; + memcpy(dupl->const_index, itr->const_index, sizeof(itr->const_index)); + dupl->src[0].is_ssa = itr->src[0].is_ssa; + if (itr->src[0].is_ssa) + dupl->src[0].ssa = itr->src[0].ssa; + else + dupl->src[0].reg = itr->src[0].reg; + + nir_ssa_dest_init(&dupl->instr, &dupl->dest, + dupl->num_components, itr->dest.ssa.bit_size, + itr->dest.ssa.name); + + dupl->instr.pass_flags = 1; + nir_builder_instr_insert(b, &dupl->instr); + } + else { + dupl = last_dupl; + } + + nir_if_rewrite_condition(use_src->parent_if, nir_src_for_ssa(&dupl->dest.ssa)); + last_parent_instr = use_src->parent_instr; + last_dupl = dupl; + } + + nir_instr_remove(&itr->instr); + return true; +} + +static void +lima_nir_duplicate_intrinsic_impl(nir_shader *shader, nir_function_impl *impl, + nir_intrinsic_op op) +{ + nir_builder builder; + nir_builder_init(&builder, impl); + + nir_foreach_block(block, impl) { + nir_foreach_instr(instr, block) { + instr->pass_flags = 0; + } + + nir_foreach_instr_safe(instr, block) { + if (instr->type != nir_instr_type_intrinsic) + continue; + + nir_intrinsic_instr *itr = nir_instr_as_intrinsic(instr); + + if (itr->intrinsic != op) + continue; + + if (itr->instr.pass_flags) + continue; + + if (!itr->dest.is_ssa) + continue; + + lima_nir_duplicate_intrinsic(&builder, itr, op); + } + } + + nir_metadata_preserve(impl, nir_metadata_block_index | + nir_metadata_dominance); +} + +/* Duplicate load uniforms for every user. + * Helps by utilizing the load uniform instruction slots that would + * otherwise stay empty, and reduces register pressure. */ +void +lima_nir_duplicate_load_uniforms(nir_shader *shader) +{ + nir_foreach_function(function, shader) { + if (function->impl) { + lima_nir_duplicate_intrinsic_impl(shader, function->impl, nir_intrinsic_load_uniform); + } + } +} + +/* Duplicate load inputs for every user. + * Helps by utilizing the load input instruction slots that would + * otherwise stay empty, and reduces register pressure. */ +void +lima_nir_duplicate_load_inputs(nir_shader *shader) +{ + nir_foreach_function(function, shader) { + if (function->impl) { + lima_nir_duplicate_intrinsic_impl(shader, function->impl, nir_intrinsic_load_input); + } + } +} |